Machine Definition and 968 Threads

Hello..sorry if this has been covered elswhere... I am a complete noob. I'm trying to find out how to develope a robotic arm or similar machine to cut 3 dimensional objects. Are there software programs that would create mechanical solutions based on a set of known results needed?

So a friend of mine posted this picture on my facebook wall. I assume there is some kind of inside joke involved that I'm not on the inside of. Anyways, I can't see any reason why this setup is impossible.

Hello everyone. I am a 12th grade Portuguese student and have a theoretical question to pose, which is probably more related to maths & statistics. In our class, we made an experiment with an Atwood Machine and deduced the formula for the acceleration of the system (ignoring the string's...

:smile: Hello people, Time Machine will not be invented. We will never travel in time, not in future, not in past. Why? If time machine will be invented then why no one travel to us from the future and say "Hello"? They fear that harm the past? Then let they send us some device from...

I know this has been asked before, but it was never really clearly explained.. The problem is as follows: Homework Statement What is the acceleration of the system shown in the diagram if the kinetic coefficient of friction is 0.15? [diagram attached.. if not visible, it is an incline plane...

Can anyone help me...from Nielsen-Chuang "quantum computation and quantum information":how might we recognize that a process in nature computes a function not computable by a turing machine?

From Nielsen-Chuang:how might we recognize that a process in nature computes a function not computable by a turing machine?

Homework Statement The descending mass of the pulley system (atwood machine) is 60g and the ascending mass is 55g. Using DataStudio to measured the slope of the velocity over time (read by the spinning spokes of the pulley) the acceleration (constant) is experimentally given as 0.316m/s^2...

Homework Statement I have to make a scheme of a bit detector that detects the bit "1101" with a Mealy Machine. So I have made the following state diagram and state table(picture 1 and picture 2) http://img215.imageshack.us/g/picture1jf.png/" Now I don't know what happens in picture 3. How...

1.Homework Statement Two masses hang from a string running over a pulley. Such a device can be used to measure the acceleration of gravity; it is then called Atwood's machine. If the masses are nearly equal, then the a of the masses will be much smaller than g; than makes it convienient to...

Homework Statement It appears that the subscript is not working properly, please take m1 to means mass 1 and m2 to mean mass2 Atwood's machine consists of two masses connected by a string that passes over a pulley, as show in the figure. Consider the pulley to be massless and frictionless...

Homework Statement A pulley is massless and frictionless, 2kg, 3kg, and 6kg masses are suspended. The 2 and 3 kilogram masses are suspended on the left side of the pulley (the 2 kilogram mass on the bottom) and are connected by a cord of negligible mass that does not stretch(T1), the 6kg mass...

In the Atwood machine, what should M be, in terms of m1 and m2 so that it doesn't move? [PLAIN]http://img163.imageshack.us/img163/8288/atwood.jpg My work: It doesn't move, so I said T1=Mg (T1 is the tension in the rope attached to M), I believe the tension in the rope connecting m1 and m2 is...

Hello, Lately I've been trying to gain an understanding of processors/cpu's and the very lowest possible code you can engineer. I decided I would do a thought experiment where I would distill the computer down to the most basic level I could conceive, and decided that such a computer would...

Homework Statement A star-connected, 3-phase, 100kVA, 415V, 50Hz synchronous motor having a synchronous reactance of 1.2ohms and negligible resistance operates at its rated terminal voltage, rated current and per-phase field-induced emf of 228V. Determine the power factor. The excitation...

As a fun project, I'm trying to design a mechanical machine as simple and elegant as possible to "crease up" a round flat piece of dough around a meatball. Any suggestions how this could work? If you know a better place where I should ask for help, please tell me. P.S. You will notice that in...

The two block in an atwood machine have masses 2kg and 3kg. Find the work done by gravity during the fourth second after the system is released from rest.I have attached my attempt here..Kindly tell me where I went wrong. I am sure that I didnt go anywhere wrong in finding the acceleration and...

Hi guys, I would really appreciate some help with this problem(probably quite easy for anybody with Electrical Engineering experience). Thanks in advance Homework Statement A 415V, 50Hz, 3-phase supply is connected to a 3 phase load of 10kw with a power factor of 0.8 lagging. Find the...

As useful as an EEG machine would be for me, I can't afford to buy one but I'm going to build one in the near future. There is a lot of information on this site http://openeeg.sourceforge.net/doc/ and from what I've read so far, building an EEG machine is no simple matter. Not for the layman...

Can questions like the one given in the following pic be solved by taking the reference frame answhere in the middle of the string and not on the fixed pulley?(http://cnx.org/content/m14731/latest/pq8.gif) A somewhat similar method has been given in http://cnx.org/content/m14783/latest/"...

i am a mechanical engineer. but, i am not good in machine drawings. i can not understand the assembly drawings. i can not visualize the 2d drawings into 3d drawings. if anybody knows the perfect method to understand and read machine/assembly drawings then please inform me.

This is my first state machine that has an input large than one bit. The simulation tool says that I synthesize my output away. I think I understand why, but don't really know how to fix it. library ieee; use ieee.std_logic_1164.all; use ieee.std_logic_unsigned.all; -- entity trimoore is...

Hi Tell me some good books on machine design and heat transfer. What about Machine design by Norton?

I'm looking for as much computational power as possible for maybe 2-3 grand. This looks like a nice setup fit to the purpose, but I thought it would be good to ask and see what other people know or have been doing. (fyi I'm not really a hardware guy myself) Glad for any input!

Homework Statement Basically, an ideal Atwood machine is released from rest (m1 != m2) and I have to find out how high the mass, say m1, bounces after an absolutely inelastic collision with the floor (no energy is lost). Homework Equations Conservation of energy, Newtons equations...

Hi, I am industrial automation engineer,I am 52 years old and I am from Romania. I would love to talk with you about "ROTARY MACHINE WITH ECCENTRIC PISTON" ,I like to say:"rotary piston" I asked the name "Rotary Piston" but the Patent Office has given the name:"ROTARY MACHINE WITH ECCENTRIC...

I am trying to deploy my oceanic model currently runing on ubuntu linux and compiled with intel fortran on a cray sv1 machine with UNICOS operating system. It actually went quite well until i tried to read unformatted files. i am using the following code to export the data to the new machine...

Homework Statement what is the average power output of an engine lifts a 250kg mass a distance of 30.0m in 20.0s? Homework Equations Ek= (1/2)(m)(v^2) Ep=mgh Ew=fnet x distance Es= (1/2)kx^2 The Attempt at a Solution Ep+Ek=f x d (.5)(200)(3)^2 + (200)(9.81)(5)= fx5.00...

Homework Statement The goal is to solve for angular acceleration with the end variables being m1,m2,m3, R, r, g. M2 > M1. An atwood machine is a pulley with 2 masses, one on each side. Homework Equations Tnet = I * angular acceleration Fnet = ma The Attempt at a Solution I know...

hi, why does a massive pulley cause different tensions in a length of cable? I've looked for answers but got only that "the pulley needs to be lifted". Couldn't really picture it. Some maths would be nice :smile: cheers!

Homework Statement My question is about a double atwood machine like this: http://farside.ph.utexas.edu/teaching/336k/Newton/img1915.png Now imagine that m1 = 5m, m2=2m, m3=3m My question is: why does the upper pulley rotate despite the fact that the masses on either side are...

If anyone could walk me through any of these or provide any help I'd appreciate it. Thanks I owe you one. Homework Statement Homework Equations The Attempt at a Solution

This may be a bit weird but please consider my idea.. Flying Machines like the aeroplane work on the principles of aerodynamic lift employing a special wing structure. What if I make an alteration to this design such that these "wings" are replaced by moveable "curved surfaces" like the...

Homework Statement The pulley in the diagram has a radius of 0.160 m and a moment of inertia 0.480 kg.m². The rope does not slip on the pulley rim. Use energy methods to calculate the speed of the 4.00 kg block just before it strikes the floor. Homework Equations The Attempt at a...

Homework Statement The two masses (m1 = 5.2 kg and m2 = 2.6 kg) in the Atwood's machine shown in The Figure are released from rest, with m1 at a height of 0.79 m above the floor. When m1 hits the ground its speed is 1.7 m/s. Assuming that the pulley is a uniform disk with a radius of 12 cm...

Homework Statement a 25% efficient machine performs external work of 200 J. what input work is required?..please answer,,is the answer is 800 J? Homework Equations The Attempt at a Solution 800 J

I have a microwave machine. I am questioning whether it has leakage or not. I am asking is there a way of measuring the leakage of microwave machine. What I have been doing was, I purchased oscilloscope, it is on the way. whenever I turned on the microwave machine, the following will be...

Homework Statement Atwood’s fall machine consists of two weight of mass m1 and m2 attached with a massless rope running around a spinning wheel of mass M and radius R without slipping. The spinning wheel is attached at its center and rotates around an axis through its center without friction...

Hello smart people, I am wondering if there is a process to convert a function to a Turing Machine. In other words, if I provide a list of input strings , and a corresponding output string for each input string, is there a way to find the minimum number of instructions to realize any function...

Homework Statement An Atwood machine has a mas of 2.50 Kg connected by a light string to a mass of 7.00 Kg over a pulley with a moment of inertia of 0.0652 kg m^2 and a radius of 11.3 cm. If the system is released from rest, what is the speed of the masses after they have moved 1.45 m? (Hint...

1. MRI (magnetic resonance imaging) is a medical technique that produces detailed "pictures" of the interior of the body. The patient is placed into a solenoid that is 40 cm in diameter and 1.0 m long. A 100 A current creates a 5.0 T magnetic field inside the solenoid. To carry such a large...

Homework Statement Homework Equations There aren't really any relevant equations. The Attempt at a Solution Ok so I just want to see if my idea for the state diagram seems ok, I'm going to give it in table form here but its the same info. F | Bk | A | B | C | D...

hello, One can wonder what is the relation between the title of this thread and the subject of quantum mechanics, well, i was reading in a book about quantum computation and information and it was talking about computer science in some chapter where it shows a basic understanding of Turing...

Ok fellow posters.. I am trying to compare two machine tools for economy of operation. machine tool 1 uses 32 Nl/m air at idle (not moving) under power and moving uses 70 Nl/m machine tool 2 uses 73.5 Nl/m air at idle (not moving) under power and moving uses 73.5 Nl/m under power uses 70...

Homework Statement Consider the Atwood's machine of Lecture 8. We wish to use this machine to measure our local acceleration of gravity with an accuracy of 5% [i.e. (Delta g)/g = 0.05]. To begin, suppose we let the mass m_1 fall through a distance L. 3.1 Find an expression for the...

Hello, Could someone please give me an explanation using the following equation? I work this evaporator machine but in the operations manual there is this equation below.I would like to further my knowledge. Equation for Evaporation Q = U x A x DT Q = Energy Transfer (W) U = Heat...

1. Types off commutator and their effect on current densit? [b.]2I want to ask how many types of commutators are there in a DC machine and what is their effect on current density..[\b] [b]3.i have been working on it for a long time and came to know tht there are two types Brushed...

Homework Statement a massless string of negligible thickness is wrapped around a uniform cylinder of mass m and raidus r. the string passes up over a massless pulley and is tied to a block of mass m at its other end. the system is released from rest. what are the accelerations of the block...

Homework Statement A simple Atwood's machine uses two masses, m1 and m2. Starting from rest, the speed of the two masses is 3.0 m/s at the end of 3.0 s. At that instant, the kinetic energy of the system is 60 J and each mass has moved a distance of 4.5 m. Determine the values of m1 and...

Homework Statement The two masses(m1 = 5.0 kg and m2 = 3.0 kg) in the Atwood's machine shown below are released from rest, with m1 at a height of 0.75 m above the floor. When m1 hits the ground its speed is 1.8 m/s. Assuming that the pulley is a uniform disk with a radius of 12 cm, determine...